Liquid recording head

Abstract

A liquid recording head includes an element substrate on which ejection energy generating elements for generating energy for ejecting droplets of liquid are provided in a staggered arrangement, ejection outlets provided opposed to the ejection energy generating elements, ejection energy generation chambers enclosing the ejection energy generating elements, and a flow path constituting member constituting first and second nozzles for supplying the liquid into the ejection energy generation chambers. The second nozzles have flow path lengths shorter than those of the first nozzles, the first and second nozzles are arranged alternately, and an average height of the paths of the first nozzles is greater than that of the paths of the second nozzles.

1. A liquid recording head comprising:
 an element substrate on which ejection energy generating elements for generating energy for ejecting droplets of liquid are provided in a staggered arrangement; 
 ejection outlets provided opposed to said ejection energy generating elements; 
 ejection energy generation chambers enclosing said ejection energy generating elements; and 
 a flow path constituting member constituting first and second supply paths for supplying the liquid into said ejection energy generation chambers, wherein said second supply paths have flow path lengths shorter than those of said first supply paths, said first and second supply paths are arranged alternately, and said first and second supply paths supply liquid into said ejection energy generation chambers in a direction transverse to an ejection direction of the droplets of liquid, 
 wherein an average height of said first supply paths is greater than that of said second supply paths. 
 
     
     
       2. A liquid recording head according to  claim 1 , wherein at least a part of said first supply paths has a height greater than that of said second supply paths. 
     
     
       3. A liquid recording head according to  claim 2 , wherein a small height portion of said first supply paths and a large height portion of said second supply paths have the same height. 
     
     
       4. A liquid recording head according to  claim 1 , wherein a height of a portion of each of said first supply paths that is adjacent to said ejection energy generation chamber associated with one of said second supply paths is greater than another portion of said first supply paths. 
     
     
       5. A liquid recording head according to  claim 1 , further comprising a contact improving layer between said element substrate and said flow path constituting member, wherein at least a section where said first flow paths have a smallest width is free of said contact improving layer. 
     
     
       6. A liquid recording head according to  claim 5 , wherein sections corresponding to an entirety of said first supply paths are free of the contact improving layer.